Lionel
When wound paints are used they are used on large limb cuts - not the
kind of thing you summer prune. Summer prunning is normally reducing
the growth to a couple of leaves on cordons or reducing length on bush
trees.
Chris raises the point that the use of such material has gone out of
fashion for the reason states - yet products such as Vitax Medo do
contain a fungicide so do provide some use. My approach is if I have
used seceteurs then it will heal itself (minor cut). If I have used a
saw - cover it (amputation!)
Clifford
Bawtry, Doncaster, South Yorkshire